Lambda-cyhalothrin suspension concentrate and its application in trapping and killing underground pests

Abstract

The present application provides a lambda-cyhalothrin suspending agent and its application in controlling underground pests. The suspending agent of the present application contains components such as lambda-cyhalothrin, emulsifier, attractant, thickener, solubilizer, defoamer, etc. By adding a suitable attractant to attract underground pests to climb out of the stratum and be killed by contact, the control effect on underground pests such as grubs is effectively improved.

Description

Field of the Invention:

[0001] This application belongs to the field of pesticides. Specifically, this application provides a lambda-cyhalothrin suspension concentrate and its application in attracting and contacting and killing underground pests. Background Art:

[0002] The pure product of lambda-cyhalothrin is a white solid, and the industrial product is a light yellow solid. Its chemical formula is C 23 H 19 C l F3NO3. It can inhibit the conduction of the insect nerve axon part, has the functions of repelling, knocking down and poisoning insects, has a wide insecticidal spectrum, high activity, rapid drug effect, and is resistant to rain erosion after spraying. However, its effect is significantly insufficient when used to kill underground pests. At present, there are few reports on cyhalothrin preparations that can attract underground pests. Summary of the Invention:

[0003] In view of the above situation, based on the existing lambda-cyhalothrin preparations, the applicant matches a more suitable underground pest attractant, especially a grub attractant. Based on the attracting effect of rosemary on underground pests such as grubs observed in practice, new attracting components are searched for and combined with existing plant-based attracting components to obtain a better attracting effect.

[0004] On the one hand, this application provides a lambda-cyhalothrin suspension concentrate, which, by mass, contains 2-3% of lambda-cyhalothrin, as well as an emulsifier, a dispersant, an attractant, a thickener, a solubilizer, an antifoaming agent and water.

[0005] Further, the composition of the suspension concentrate is:

[0006]

[0007]

[0008] Or

[0009] Component Content (%) Lambda-cyhalothrin 2-3 Polycarboxylate dispersant 5-20 Attractant 10-30 Magnesium aluminum silicate 0.1-0.5 Methyl oleate 2-6 Glacial acetic acid 1-2 Fatty alcohol phosphate 0.5-2 Organosilicon defoamer 1-3 Water Make up to 100

[0010] Further, the attractant contains 40-80% of sucrose, 5-10% of polyglutamic acid, 5-10% of vitamin c, 5-30% of biochemical fulvic acid stock solution, and 3-10% of odor attractant.

[0011] Further, the composition of the attractant is 75% of sucrose, 5% of polyglutamic acid, 5% of vitamin c, 10% of biochemical fulvic acid stock solution, and 5% of odor attractant.

[0012] Further, the odor attractant is a vanillin compound and / or carnosic acid.

[0013] Further, the vanillin compound is ethyl vanillin.

[0014] Further, the odor attractant is composed of ethyl vanillin and lithospermic acid in a mass ratio of 1:1.

[0015] On the other hand, the present application provides the use of the above-mentioned suspending agent in controlling underground pests.

[0016] Further, the underground pests are white grubs or cutworms.

[0017] Further, the dosage of the suspending agent in the above application is 40 - 80 mL per mu.

[0018] The preparation method of the suspending agent in the embodiments of the present application is as follows: Mix the formula amount of beta-cyhalothrin, emulsifier, dispersant, attractant, solubilizer, defoamer and appropriate amount of water to make a slurry, and stir and shear; Grind to a particle size D98 of about 2 microns; Filter; After the thickener is formulated with water, it is added to the filtered slurry and mixed evenly. Those skilled in the art can adjust the mixing sequence, time parameters, particle size, etc. according to factors such as ingredients and equipment.

[0019] The purity of the odor attractant compound used in the embodiments of the present application is above 90%. In practice, those skilled in the art can select compounds with different purities to prepare the attractant and suspending agent composition according to factors such as requirements and prices.

[0020] The polycarboxylate dispersant used in the embodiments of the present application is Geropon T / 36. Other similar dispersants such as Geropon T / 72 and other types of dispersants can be conventionally selected by those skilled in the art. Specific embodiments:

[0021] The following embodiments are only for demonstrating the feasibility and effects of the technical solutions of the present application, and do not limit the protection scope of the present application. The protection scope of the present application is only defined by the claims.

[0022] Example 1 Screening of the attractant formula

[0023] The following only shows some representative formulas in the screening process (the percentages shown are mass percentages unless otherwise specified):

[0024] After preliminary experiments, the applicant selected a basic formula of 75% sucrose, 5% polyglutamic acid, 5% vitamin c, 10% original solution of biochemical fulvic acid, and 5% odor attractant. Subsequently, the effects of various odor attractants were tested:

[0025] Odor attractant formulation 1: 25% phenethyl propionate, 50% eugenol, 25% geraniol (a currently relatively mature and commercially available formulation, used as a control).

[0026] Odor attractant formulation 2: 100% vanillin;

[0027] Odor attractant formulation 3: 100% ethyl vanillin;

[0028] Odor attractant formulation 4: 100% carnosic acid;

[0029] Odor attractant formulation 5: 50% carnosic acid, 50% vanillin;

[0030] Odor attractant formulation 6: 50% carnosic acid, 50% ethyl vanillin;

[0031] Attraction experiment:

[0032] Experimental subject: white grubs (Japanese beetles)

[0033] Test method: Prepare a 25 cm × 20 cm × 8 cm transparent experimental box, and place 50 active white grubs into the experimental box respectively, covering the soil with 5 cm; prepare a 1% w / v solution of the attractants using odor attractant formulations 1 - 6 (correspondingly called attractants 1 - 6); use a spray bottle to spray 5 mL of the above-mentioned attractants 1 - 6 solution or water on the soil surface in each experimental box; observe the number of white grubs climbing to the soil surface after standing at room temperature indoors for 4 hours (the results of three parallel experimental boxes are averaged and rounded to an integer). The results are shown in Table 1:

[0034] Table 1 Results of the attractant attraction experiment

[0035]

[0036] [[ID=3�]] B

[0037] The results show that vanillin - type compounds and carnosic acid both have an attracting effect on white grubs, but their effects are inferior to the currently commercially available attractant formulations. However, when the two are used in combination, the synergistic effect is obvious, and the combined effect of carnosic acid and ethyl vanillin exceeds the commercially available formulation of PEP, eugenol, and geraniol.

[0038] Prepare aqueous solutions of attractants 5 and 6 with concentrations of 5%, 10%, 20%, and 30%, and they can all maintain a homogeneous and stable state after being sealed and placed at room temperature for 30 days.

[0039] Example 2 Screening of suspension formulations <\

[0040] Based on attractant 6 in Example 1, the applicant tried a large number of suspending agent formulations. Only some representative formulations during the screening process are shown below (percentages shown are mass percentages unless otherwise specified): Formulation 1

[0041] Component Content (%) Lambda-cyhalothrin 2.5 Polycarboxylate dispersant 10 Attractant 25 Xanthan gum 0.3 Methyl oleate 5 Glacial acetic acid 1 Fatty alcohol polyoxyethylene ether phosphate 1 Alkyl naphthalene sulfonate 2 Organosilicon defoamer 2 Water Make up to 100

[0042] Formulation 2

[0043] Component Content (%) Lambda-cyhalothrin 2.5 E0-PO block polyether 10 Attractant 25 Magnesium aluminum silicate 0.3 Methyl oleate 5 Glacial acetic acid 1 Fatty alcohol phosphate 1 Organosilicon defoamer 2 Water Make up to 100

[0044] Formulation 3

[0045] Component Content (%) Lambda-cyhalothrin 2.5 E0-PO block polyether 10 Attractant 25 Xanthan gum 0.3 Methyl oleate 5 Glacial acetic acid 1 Fatty alcohol polyoxyethylene ether phosphate 1 Alkyl naphthalene sulfonate 2 Organosilicon defoamer 2 Water Make up to 100

[0046] Formulation 4

[0047]

[0048]

[0049] Laboratory trapping experiment:

[0050] Experimental subject: White grubs (Japanese beetles)

[0051] Test method: Prepare a 25 cm × 20 cm × 8 cm transparent experimental box, put 50 active white grubs into the experimental box respectively, cover with 5 cm of soil; use a spray bottle to spray 5 mL of the formulations of Formulations 1 - 4 diluted 1000 times or the commercially available 2.5% lambda-cyhalothrin emulsifiable concentrate (Bainong Sida, without attractant; Shannong Biotechnology, Dichong 203, the use of attractant is mentioned in the web introduction) on the soil surface; observe the number of dead white grubs on the soil surface after standing at room temperature indoors for 8 hours (the results of three parallel experimental boxes are averaged and rounded to an integer). The results are shown in Table 2:

[0052] Table 2 Results of the suspending agent trapping experiment

[0053] Attractant Number of white grubs crawling to the soil surface Bainong Sida 2 Dichong 203 12 Formula 1 35 Formula 2 25 Formula 3 28 Formula 4 33

[0054] The results show that: Formulations 1 - 4 can all effectively trap underground white grubs, and have a significant synergistic effect compared with the 2.5% lambda-cyhalothrin formulation without attractant. Compared with the 2.5% lambda-cyhalothrin formulation without attractant, Dichong 203 does have an obvious trapping effect, but the attractant (unknown composition) used in it has an unsatisfactory effect.

[0055] Field trapping experiment:

[0056] The test subjects were white grubs and black cutworms. Peanut demonstration fields with similar white grub and black cutworm disease conditions were selected around Zhongmou County, Zhengzhou City, Henan Province. Multiple plots of about 2 fen were divided in it, and the above-mentioned Bainong Sida and Dichong 203 2.5% beta-cypermethrin emulsifiable concentrate preparation and the preparation of Formula 4 were sprayed at a 1000-fold dilution (each drug was sprayed on 3 plots, and the plots of the same drug were not adjacent). The number of dead insects on the ground surface was counted 12 hours after spraying (the results of the three plots were averaged and rounded to an integer). The spraying experiment was repeated after an interval of 30 days. The results are shown in Table 3:

[0057] Table 3 Results of field trapping experiment

[0058]

[0059] Basically consistent with the laboratory results, Formula 4 achieved an obvious trapping effect. When the dosage was large, the trapping effect was better, and the effect was better than similar commercially available products.

Claims

1. An efficient lambda-cyhalothrin suspending agent, characterized in that, The composition of the lambda-cyhalothrin suspending agent is as follows: Or, By mass percentage, the composition of the attractant is: 75% sucrose, 5% polyglutamic acid, 5% vitamin C, 10% biochemical fulvic acid stock solution, 5% odor attractant; the odor attractant is composed of ethyl vanillin and salvianolic acid in a mass ratio of 1:

1.

2. The application of the lambda-cyhalothrin suspending agent according to claim 1 in controlling underground pests, wherein the underground pests are white grubs or cutworms.

3. The application according to claim 2, wherein the dosage of the lambda-cyhalothrin suspending agent in the application is 30-50 mL per mu.

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